Type-writer.



A. C. ROEBUCK.

TYPE WRITER. APPLICATlON fiLED FEB- s. :914.

2 SHEETSSHEET I.

A. C. ROEBUCK. TYPE WRITER.

APPLICATION F|LD FEB. 9. I914.

1,364,595, Patente Nov. 14, 1916.

2 SHEETS-SHEET 2- uurnn sans PAENT enric ALVAI-I C. ROEBUCK, 0F WOGDSTOCK, ILLINGIS, ASSIGNOR TO WOODSTOCK T'YlEWRITFJR COMPANY, OF WOODSTOCK, ILLINOIS, A CORPORATION OF ILLINOIS.

TYPE-WRITER.

Specification of Letters Patent.

Patented Nov. it, rare.

Application filed February 9, 1914. Serial No. 817,443.

To all whom it may concern Be it known that I, ALVAH C. RonBUcK, a citizen of the United States, residing at Woodstock, in the county of McHenry and State of Illinois, have invented certain new anduseful Improvements in Type-Writers, of which the following is a specification.

' This invention relates to typewriters, and

more particularly to the escapcment mecha- I msm.

' The principal object of the invention is to provide a mechanism of this class which is effective and eificient in operation.

Another object of the invention is to provide a mechanism of this class in which the escapement dog rocker is:act uated by the universal bar during a portionof its movement with an accelerating movement and is thereafter moved at a continuous rate.

For the attainment of these ends and the accomplishment of other new and useful objects as will appear, the invention consists in the features of novelty in the construction, combination and arrangement of the several parts generally shown in the accom- Fig. 4 is a perspective view of the universal bar and the dog rocker. Fig. 5 is a detail view showing the dog rocker in an intermediate position, and Fig. 6 is a detail view showing the dog rocker in anotherposition.

Referring now more pa ticularly to the drawings, the frame of the typewriter, a portion only of which is shown, is designated by the numeral 7, and connected to this frame is a slotted type bar segment 8 in the slots of which a plurality of type bars 9 are movable. These type bars are formed with an engaging shoulder 10 and are provided with a slotted projection 11 by means of which the type bars are connected to a suitable operating mechanism. (Not shown.)

Mounted for free reciprocating movement at the rear of the type bar segment is a universal bar 12 connected to or formed integral with a frame 13 which is considered in connection with the universal bar proper 12 as the universal bar. The shoulders 10 on the type bars are adapted to engage the universal bar 12 when the type bars are actuated but not until the type bars have nearly reached the end of their,,actuating strokes. The type bar segment is prefer- .ably formed with a groove 14 in which the universal bar 12 is seated. The frame 13 to which it is connected is provided with a standard 15 and is formed with a perforated projection 16 in which is mounted'a bearing pin 17, one end being threaded in the support 15 and held in place by means of a locknut l8 and the other end being adapted to enter a perforation'in the rear of the segment 8," the pin being provided with a shoulder 19 adjacent the end to limit the movement of the universal bar and the frame 13 in the direction of the segment.

Adjacent the rear of the 'frarne 13 depending from the frame 7 are a pair of lugs 20 in which is mounted one 'end of a rocker 21. The frame 13 is formed with bent portions 22 which are pivotally connected to i the other end of the rocker 21 so that the frame 13 and the'universal bar 12 may be reciprocated toward and away from the segment when the universal bar is struck the type bars. The rocker 2.1 is formed with a projection 23 in whicl'r'is threaded a pin 24. A pin 25 is supported by the frame 7 in substantial alinement with the pin 24 and a spring 26 is seated on the pins 24 and 25 which tends to press the rocker 21 about its point of pivotal support and to press the universal bar 12 toward the type segment 8. An adjustable stop 21 is pro vided on the rocker 21 to limit the rearward movement thereof.

An escapement wheel 27 1's mounted in the frame 7 above the rocker 21, and connected to or formed integral with it is a pinion'28 which meshes with the ordinary feed rack (not shown) of the escapement mechanism. The movement of this escapement wheel is controlled by means of a fixe dog 29- and a 'anovablc dog 30 which are both supported by a pi otally mounted dog rocker 31. This dog rocker preferably comprises a single piece of sheet material with bent perforated extremities 32 which are mounted in-the depending lugs 20. The

nected to the dog engaged'either -mov time, except while changing from dog ,30 is alsoformed with gig.

29 is fixed with respect to the dog rocker 31 but the dog comprises a member formed at one end with a longitudinal slot 33" and at the end adjacent the tooth of'the. dog with an opening 34. Extending through the slot and the opening are screws 35 and 36 both of which are connected to the dog rocker 31. The slot and opening permit this dog tobe moved longitudinally on the screws, and the opening 34 being larger than the screw permits the toothed end of the dog to be moved up and down about the screw 35 as a pivot. This dog a projection 37, and connected to the projection is one end of a spring 38, the other end of which is coning to draw the dog longitudinally and to force the toothed end thereof upwardly about the screw 35 as a pivot.

In operation the escapement wheel 27 is v by the fixed dog 29 or the ble dog 30 but not by both at the same one to the other, for when type bars are actuated the do rocker 31 is oscillated about its 1 point 0 pivotal support so that the escapement wheel 27 is in engagement with the the spring of which'is elon: gated, and as soon as the dog rocker 31 is oscillated the dog 30 is moved out of engagement with the tooth and the escapement wheel is engaged by the fixed do 29.

In order to hold the dog ,eec er in the proper position and to move itrat the proper time, a lever 39 is pivotally connected at one end to the rear of the frame 13 attached to the universal'bar, and the other end of the lever is pivotally connected to a projection 40 on the frame of the machine. This lever 39 is formed with a rounded or curved engaging edge 41 which bears against the dog rocker 31. The dog rocker is held in engagement with the lever 39 by means of a spring 42' attached to the dog rocker and to a fixed member on the frame 7. In operation, when the universal bar is in its forward position, as shown in Fig. 1, the side of the curved edge 41 near the end which is attached to the projection 40 is in engagement with the dog rocker, as shown in Fig. 1. The rearward movement of the universal bar 12 and its frame 13 causes the accelerating movement or oscillation, of the dog rocker 31 because of the curvature of the engaging surface 41. and the oscillation of the dog roclrer is increased until the universal bar has been moved a portion, about one-half, of its full length of travel, at which time the parts will be in the relative phsitions shown by Fig. 5. The remaining movement of the universal bar frame 13 will cause a full oscillation of the dog rocker 31 but it will be with no further acceleration over the movement of the movable dog,

rocker 31, the spring tendframe itself because of the curvature of the surface 41, and the rate of movement of the dog rocker will be substantially the same as that of the frame 13.

It is a well known fact that accelerating movement is desirable in connection with the movement of the type bars of a typewriting machine. In this invention this accelerating movement has been carried to the connection between the universal bar and the dog rocker. The contact rocker may be said to be out of direct contact with the universal bar, which is connected thereto throughthe medium of a lever which acts upon the dog rocker at dilierent distances from its fulcrum point. While the lever begins to move as soon as the universal bar moves, the movement of the dog rocker at the beginning is very slight and otters very little resistance to the universal bar because of the long leverage that is exerted upon it. As the movement of the universal bar progresses, the speed of movement of the dog rocker is increased until it reaches a point where the universal bar has traveled approxima'tel one-half of its range of travel at which point there is no further acceleration but throughout the remainder of the travel of the universal bar the dog rocker travels at approximately the same zpeed or at the same speed as the universal ar. r

What I claim is:

1. In escapement mechanism for typewriters, the combination with a universal bar having a surface to engage and to move the dog rocker at a varying speed.

2. In escapement mechanism for type writers, the combination with a universal bar, of an escapement dog rocker, and a device pivoted to the universal bar to contact with the dog rocker at difierent distances from the pivot point as moved.

3. In escapement mechanism for type writers, the combination with a universal bar, of an escapement dog rocker, and a lever pivoted on the'universal bar and adapted to engage the dog rocker at different distances from its fulcrum point when the'universal bar is moved.

4. In escapement mechanism for typewriters the combination with a universal bar, oflan escapement dog rocker, and a lever connected to the universal bar and to the typewriter frame and adapted to engage the dog rocker and cause an accelerating movement thereof.

the universal bar is 5. In escapement mechanism for typewriters, the combination with a universal bar, of an escapement dog rocker, and lever pivoted to the universal bar and to the frame of the typewriter adapted to enment with the lever.

gage the dog rocker and to produce an accelerating movement of the dog rocker through a part of the movement of the universal bar and a substantially uniform movement throughout the remainder of the travel of the universal bar in one direction.

6. In a typewriter, the combination with a reciprocable universal bar, of escapement mechanism, and a member operated by the universal bar having a contact surface for engaging the mechanism to transmit motion of the universal bar to the mechanism with accelerating movement during part of the travel in one direction of the universal bar.

7. In escapement mechanism for typewriters, the combination with a. universal bar, of supports, a rocker pivotally mounted in the supports and connected to the universal bar, a dog rocker also pivotally mounted in the supports, a lever pivotally connected to one end of the universal bar and at the other end to the frame of the machineand having aconveX surface for engagement with the dog rocker, and means tending to press the dog rocker in engage- 8. In escapement mechanism for typewriters, the combination with a universal bar, of escapement mechanism comprising a dog rocker, and a lever pivotally connected at one end to the frame of the typewriter and at the other end to the universal bar and having a convex surface between the extremities adapted to engage the dog rocker.

9. In escapement mechanism for typewriters, the combination with a universal bar, of escapement mechanism comprising a dog rocker, a lever pivotally connected at one end to the frame of the typewriter and at the'other end to the universal bar and having a rounding surface between the eX- tremities adapted to engage the dog rocker, and a spring tending to press the dog rocker in engagement with the lever.

10. In 'escapement mechanism for typewriters, the combination with a universal bar, of a rocker for supporting the same, means tending to press the rocker in one direction, a co-acting escapement mechanism comprising a dog rocker, means for imparting movement of the universal bar in one direction to the dog rocker with an' accelerating movement, and a spring to hold the dog rocker in contact with said means.

11. In escapement mechanism for typewriters, the combination with a reciprocable.

universal bar, of a rocker for supporting one end thereof, depending pai'ts in which the rocker is pivotally mounted, a dog rocker also pivotally, mounted in said parts,

.a fixed dogi-n connection with the dog rocker, a movable dog 1n connection with the dog rocker, an escapement wheel adapted to be engaged by either one but not both of the dogs at the same time, except in changing from one to the other, a member pivotally connected to the universal bar and to the typewriter frame adapted to engage the dog rocker, and a spring to press the dog rocker in engagement with the member.

12. In escapement mechanism for typewriters, the combination with a type bar segment having a grooved rear face and a perforation therein, of ia universal bar-'75 adapted to be seated :in'the groove, a universal bar frame conneotedqto the universal bar, an adjustable shouldered pin connected to the frame and adapted to be inserted in the perforation of the segment to support the forward end of the universal bar frame, a rocker piuotally mounted in the type writer frame/gland pivotally connected to the universal baa' frame, a spring tending to press the universal bar in engagement with the segment, an escapement wheel, a dog rocker pivotally mounted in the frame, a fixed dog connected to the dog rocker, a, movable dog carried by the dog rocker, a

lever pivoted at one end to the universal bar 99 frame and at the other end to the typewriter frame and. having a curved surface adapted to engage the dog rocker, and a spring tending to hold the dog rocker in engagement with the vlever whereby the writers, the combination with a pivotally roe mounted dog rocker having fixed and movable dogs, of a type bar segment, a uni versal bar supported at one end by the type bar segment, a spring-pressed rocker to support the universal bar at the other end, 105,.

means to oscillate the universal bar, and a lever pivotally connected to the universal bar and tothe frame of the machine normally in contact with the dog rocker to operate it in accordance with the movement of 11a j the universal bar.

In testimony whereof I have signed my a name to this specification, on this 31st day of January, A. D. 1914:.

" ALVAH o. aonnuon. 

